Iba weather in September

In September, Iba sees average daytime highs of 28°C and overnight lows near 25°C, with 431 mm of rain across 28 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Iba's 10th-clearest and 4th-windiest month. For the whole year in context, see Iba's year-round climate.

Daytime high
28°
11th warmest
Overnight low
25°
8th coldest
Rainfall
431 mm
28 wet days
Daylight
12 h 06 min
5:52 AM – 5:57 PM
Cloud cover
88%
10th clearest
Wind
8 km/h
4th windiest
Solar energy
4.32 kWh/m²
Travel score
3.2
out of 10

Iba is municipality of the Philippines and capital of the province of Zambales.

Density
176/km²
people per km²
Founded
1611

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Iba reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12825
22825
32825
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282925
292925
302925

How September really feels in Iba

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Iba weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 23°143.211.26.8
Feb29° / 23°193.211.56.5
Mar30° / 24°325.511.95.8
Apr31° / 25°4810.212.34.7
May30° / 26°21022.212.73.4
Jun29° / 25°39127.612.93.0
Jul28° / 25°62029.912.83.1
Aug28° / 25°63329.812.53.3
Sep28° / 25°4312812.13.2
Oct29° / 25°25221.811.73.9
Nov29° / 24°9511.411.35.2
Dec29° / 24°577.211.16.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1595
2595
3595
4595
5595
6595
7595
8595
9595
10694
11694
12694
13793
14793
15793
16793
17991
18991
19991
201090
211090
221090
231189
241288
251288
261288
271486
281486
291585
301585

Chance of precipitation in September

Any precipitation

Iba gets around 431 mm of rain over 28 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 93% and peaks near 96% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
192
292
392
492
592
693
793
894
994
1094
1195
1295
1396
1496
1596
1696
1796
1896
1996
2095
2195
2294
2393
2493
2592
2691
2790
2889
2988
3087

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
14456
24456
34456
44456
54555
64555
74555
84555
94654
104654
114654
124753
134753
144753
154852
164852
174753
184753
194753
204654
214654
224555
234555
244555
254654
264654
274654
284753
294852
304852

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:51 AM to 5:53 AM, and sunset from 6:09 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:516:09
212.35:516:08
312.35:516:07
412.35:516:07
512.25:516:06
612.25:516:05
712.25:516:04
812.25:516:03
912.25:516:03
1012.25:516:02
1112.25:526:01
1212.15:526:00
1312.15:525:59
1412.15:525:59
1512.15:525:58
1612.15:525:57
1712.15:525:56
1812.15:525:55
1912.05:525:55
2012.05:525:54
2112.05:525:53
2212.05:525:52
2312.05:525:51
2412.05:525:50
2512.05:535:50
2611.95:535:49
2711.95:535:48
2811.95:535:47
2911.95:535:47
3011.95:535:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.32 kWh/m².

For context, solar energy here swings from a low near 4.15 kWh/m² to a high of 6.48 kWh/m² in April across the year — September's 4.32 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.4Bright
244.4Bright
254.4Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.6Bright
Planning a trip in September

Hazard calendar for Iba

In seasonPeak

In September, Iba sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Iba sits in the Pacific typhoon belt; the season peaks July–October.

Iba's monsoon runs June–September, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Iba?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.2
Sightseeing
10th-best month of the year
3.8
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Iba.

What to pack for Iba in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Iba sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Iba in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 30°C and coldest in February near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Iba in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iba peaks around August 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 17UV 14Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Iba in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Iba is worst in November — around 30 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateNov 1530 µg/m³Aug 1421 µg/m³
PM2.5 (µg/m³)Level
Jan27Moderate
Feb26Moderate
Mar29Moderate
Apr28Moderate
May23Moderate
Jun22Moderate
Jul21Moderate
Aug21Moderate
Sep22Moderate
Oct29Moderate
Nov30Moderate
Dec29Moderate
Location & terrain

Where is Iba?

Iba sits at 15.3°N, 120.0°E, 13 m above sea level, in Philippines. The nearest listed city is Botolan, 7.0 km away.

Topography around Iba

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Iba.

Within 3 km, the terrain around Iba has only modest variations in elevation — a maximum elevation change of 43 m around an average of 5 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,276 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,021 m.

The land around Iba is covered by water (40%) and trees (28%) within 3 km, water (47%) and trees (29%) within 16 km, and water (38%) and trees (36%) within 80 km.

3 km
43 m
16 km
1,276 m
80 km
2,021 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Botolan 7.0 km · Masinloc 23 km · San Narciso 37 km · San Marcelino 44 km · San Antonio 44 km · Santa Cruz 49 km · Castillejos 50 km · Subic 57 km

Philippines travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 60 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$4,171
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Homicide rate
4.3
per 100k, 2023
Road deaths
12
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 569
Religion
Roman Catholic 79%other 8%Muslim 6%other Christian 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Iba (15.3276°, 119.978°, elevation 13 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).